CN113954737A - Automobile headlamp position adjusting system - Google Patents
Automobile headlamp position adjusting system Download PDFInfo
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- CN113954737A CN113954737A CN202111136621.9A CN202111136621A CN113954737A CN 113954737 A CN113954737 A CN 113954737A CN 202111136621 A CN202111136621 A CN 202111136621A CN 113954737 A CN113954737 A CN 113954737A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/06—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle
- B60Q1/08—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically
- B60Q1/12—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically due to steering position
- B60Q1/122—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically due to steering position with electrical actuating means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The invention discloses an automobile headlamp position adjusting system, which comprises an angular displacement sensing unit, a control unit and a control unit, wherein the angular displacement sensing unit is used for acquiring steering wheel corner signals; the inclination angle sensor unit is used for collecting an inclination angle signal of a steering wheel; a key simulation unit for adjusting a vehicle speed; the single chip microcomputer is used for processing signals sent by the key simulation unit, the inclination angle sensor unit and the angular displacement sensing unit and adjusting the position of the automobile headlamp through the follow-up steering engine unit; and a processing unit within the single chip; the automobile headlamp position adjusting system has the technical key points that when an automobile runs on a curve or a ramp, road conditions can be acquired through system hardware equipment, operation and analysis are carried out, the position of the headlamp is automatically adjusted up and down and left and right, and the headlamp can be dynamically adjusted continuously by the headlamp position adjusting system, so that a lighting blind area is eliminated, a better lighting effect is obtained, and the safety and the comfort of a driver driving the automobile are improved.
Description
Technical Field
The invention relates to the technical field of automobile headlamp regulation, in particular to an automobile headlamp position regulating system.
Background
The rapid development of scientific technology promotes the vigorous development of the automobile industry, more and more automobile buyers are provided, along with the increasing emphasis on science and technology of people, the requirements of consumers on the comfort, the dynamic property, the safety, the appearance design, the environmental protection, the energy conservation and the like of automobiles are improved, especially the requirements on the safe driving and the driving comfort of the automobiles are heavier, and each automobile buyer can consider the driving safety of the automobiles when buying the automobiles; as an important research direction in the field of active safety of automobiles, automobile headlights are essential for the research design thereof.
The traditional headlamp system has the defects that the illumination light type is single, the illumination angle cannot be adjusted according to real-time road conditions, an illumination blind area exists on the inner side of a curve when the curve runs, and the illumination angle cannot be adjusted by a ramp, so that the occupation ratio of traffic accidents caused by poor illumination in the total number of traffic accidents all the year around is always high in the running process of an automobile;
the information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide an automobile headlamp position adjusting system which can remove a lighting blind area and obtain a better lighting effect.
In order to achieve the above object, the present invention provides an automobile headlamp position adjusting system, including:
the angular displacement sensing unit is used for collecting a steering wheel corner signal;
the inclination angle sensor unit is used for collecting an inclination angle signal of a steering wheel;
a key simulation unit for adjusting a vehicle speed;
the single chip microcomputer is used for processing signals sent by the key simulation unit, the inclination angle sensor unit and the angular displacement sensing unit and adjusting the position of the automobile headlamp through the follow-up steering engine unit; and
a processing unit within the single chip processor, which is programmed by the set of equations:
and calculating to obtain the actual deflection angle of the headlamp, and using the actual deflection angle to compensate the curve lighting blind area.
In one or more embodiments, the angular displacement sensing unit includes an angular displacement sensor, the angular displacement sensor is connected with a C3 interface on the single chip microcomputer, and an AD converter is arranged on a connection line between the angular displacement sensor and the single chip microcomputer.
In one or more embodiments, the tilt sensor unit includes a tilt displacement sensor, the tilt displacement sensor is connected to H3 and H4 interfaces on the single chip, and H3 and H4 are used for controlling I of the chip2C interface, and performs I with tilt sensor2And C, communication.
In one or more embodiments, the key simulation unit comprises a vehicle speed increasing button and a vehicle speed reducing button, and the vehicle speed increasing button and the vehicle speed reducing button are both connected with the single chip microcomputer through wires.
In one or more embodiments, the single chip microcomputer is an S9KEAZ128AMLK single chip microcomputer with I2And C, communication serial ports.
In one or more embodiments, the follower steering engine unit comprises a horizontal follower steering engine and a vertical follower steering engine;
the single chip microcomputer receives steering wheel rotation angle and vehicle speed signals through C3, D0 and D1 interfaces, and the horizontal follow-up steering engine is controlled to operate by an H0 serial port; the tilt angle signals are received by H3 and H4, and the operation of the vertical follow-up steering engine is controlled by an H1 serial port.
In one or more embodiments, the vehicle-mounted display device further comprises an OLED display screen, the OLED display screen is used for displaying the steering wheel angle and the vehicle body inclination angle, and the OLED display screen is connected with the single chip microcomputer through a conducting wire.
In one or more embodiments, the calculation of the formula set is:
s1, calculating the turning radius of the automobile,
according to the principle of the ackerman steering, all wheels roll purely in the rotating process of the automobile, all wheel shafts are intersected at a point O which becomes a steering center, and the distance from the steering center O to the contact point of the outer steering wheel and the ground is called the turning radius R of the automobile;
according to a geometric principle diagram, the following steps are obtained:
wherein, R: the turning radius of the automobile;
l: the distance between the shafts;
δ: an outboard front wheel steering angle;
the steering wheel and the steering wheel of the steering system of the automobile are connected through a speed reducing mechanism, and the following relation exists between the steering wheel rotating angle Q and the outer front wheel rotating angle delta:
Q＝K*δ
wherein K is the ratio of the steering wheel rotation angle to the front wheel steering angle, the steering wheel rotation angle Q and the front wheel steering angle delta are in a certain proportional relationship,
if the automobile is 10:1, the Q: delta is 10: 1;
if the axle distance L is 2.5m, the turning radius of the automobile can be obtained as follows:
s2, calculating the left and right deflection angles of the front lamp,
when the turning path matches the vehicle light illumination:
θ＝arcsin(S/2R)
s is a parking sight distance, and specifically comprises the following steps:
S＝0.01V2+0.277V+0.029
in summary, the final set of equations can be derived:
compared with the prior art, the automobile headlamp position adjusting system has the beneficial effects that:
the automobile headlamp position adjusting system can automatically adjust the position of the headlamp up and down and left and right by acquiring road conditions and performing operation and analysis through system hardware equipment when an automobile runs on a curve or a ramp, and the headlamp position adjusting system can continuously perform dynamic adjustment on the headlamp, so that a lighting blind area is eliminated, a better lighting effect is obtained, and the safety and the comfort of a driver in driving the automobile are improved.
Drawings
Fig. 1 is a diagram of the overall design of a headlight position adjustment system according to an embodiment of the invention.
Fig. 2 is an ackermann steering geometry diagram according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a turning path and headlight illumination matching according to an embodiment of the present invention.
Fig. 4 is a main flow chart of a program in the one-chip microcomputer according to an embodiment of the present invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Example 1:
the embodiment provides a specific structure of an overall regulation and control system, and as shown in fig. 1, the angular displacement sensing unit is used for collecting steering wheel corner signals;
the angular displacement sensing unit comprises an angular displacement sensor, the angular displacement sensor is connected with a C3 interface on the single chip microcomputer, and an AD converter is arranged on a connecting line of the angular displacement sensor and the single chip microcomputer.
The angular displacement sensor adopts a WDD35D4 angular displacement sensor which can be placed in an inverted state, can be connected with a toy steering wheel through a coupler, simulates the change of the corner input of the steering wheel, and meets the requirements of physical manufacture.
The inclination angle sensor unit is used for collecting an inclination angle signal of a steering wheel;
the inclination angle sensor unit comprises an inclination angle displacement sensor, the inclination angle displacement sensor is connected with H3 and H4 interfaces on the single chip microcomputer, and H3 and H4 are used for controlling I of the chip2C interface, and performs I with tilt sensor2C, communication;
the inclination displacement sensor adopts an MPU6050 inclination sensor which is a first global integrated 6-axis motion processing component, and compared with other multi-component inclination sensors, the inclination displacement sensor avoids the problem of time axis difference between a combined gyroscope and an accelerator, and reduces a large amount of packaging space. The module is small and applicable, and an MPU6050 inclination angle sensor uses I2And C, protocol communication.
A key simulation unit for adjusting a vehicle speed;
the key simulation unit comprises a vehicle speed increasing button and a vehicle speed reducing button, and the vehicle speed increasing button and the vehicle speed reducing button are connected with the single chip microcomputer through wires.
The single chip microcomputer is used for processing signals sent by the key simulation unit, the inclination angle sensor unit and the angular displacement sensing unit and adjusting the position of the automobile headlamp through the follow-up steering engine unit;
the servo steering engine unit comprises a horizontal servo steering engine and a vertical servo steering engine;
the single chip microcomputer receives steering wheel rotation angle and vehicle speed signals through C3, D0 and D1 interfaces, and the horizontal follow-up steering engine is controlled to operate by an H0 serial port; the H3 and H4 receive inclination angle signals, and the H1 serial port controls the vertical follow-up steering engine to operate;
the operating principle of the steering engine is as follows:
when the steering engine works, the motor drives the internal reduction gear set, the output end of the motor is used for position detection through a linear proportional potentiometer, the proportional potentiometer converts the rotation angle coordinate of the steering engine into a proportional voltage and feeds the proportional voltage back to the control circuit board, the control circuit board compares the proportional voltage with an input control pulse signal to generate a correction pulse, and the correction pulse drives the motor to rotate forwards or reversely so that the position output by the gear set is consistent with an expected value.
Wherein the single chip microcomputer adopts an S9KEAZ128AMLK single chip microcomputer with I2C communication serial port, the singlechip is arranged on the early KEA128 core board, and the singlechip also comprises an OLED (organic light emitting diode) and Bluetooth interface, a reset and clock module and the like.
Table one (pin table for single chip):
| pin | Connecting part |
| D0、D1 | Key module |
| H3、H4 | Inclination sensor module |
| F2、F3、A6、A7、C7 | OLED display module |
| C3 | Corner sensor module |
| H0、H1 | Execution module |
(ii) a The device also comprises an OLED display screen, wherein the OLED display screen is used for displaying the steering wheel angle and the vehicle body inclination angle, and the OLED display screen is connected with the single chip microcomputer through a wire.
The above-mentioned OLED display is also called organic electroluminescent display, and it can be used to display numbers, letters and symbols, and when current flows through the OLED, the organic material coating on the display can emit light by itself to display.
And
a processing unit within the single chip processor, which is programmed by the set of equations:
and calculating to obtain the actual deflection angle of the headlamp, and using the actual deflection angle to compensate the curve lighting blind area.
The angular displacement sensing unit comprises an angular displacement sensor, the angular displacement sensor is connected with a C3 interface on the single chip microcomputer, and an AD converter is arranged on a connecting line of the angular displacement sensor and the single chip microcomputer.
By adopting the technical scheme:
compensate the blind area of the visual field when turning left and right: the traditional headlamp can generate a visual field blind area when turning, so that unsafe factors of driving are increased, and the headlamp position adjusting system can adjust the left and right steering of the headlamp according to a corner signal acquired by the angular displacement sensor and a speed signal simulated by the key at the moment so as to compensate the visual field blind area.
Compensation slope field of view range: when the automobile runs up and down a slope, the automobile body has a certain pitching inclination angle, so that the illumination range of the automobile headlamp is narrowed, and at the moment, the headlamp position adjusting system adjusts the up-down illumination angle of the headlamp according to the change of the slope inclination angle, compensates the illumination range and enlarges the visual field of a driver.
Example 2:
in this embodiment, a specific flowchart of the calculation of the left and right rotation angles of the headlamp is given, and as shown in fig. 2 to 4, the calculation process of the formula set is as follows:
s1, calculating the turning radius of the automobile,
according to the principle of the ackerman steering, all wheels roll purely in the rotating process of the automobile, all wheel shafts are intersected at a point O which becomes a steering center, and the distance from the steering center O to the contact point of the outer steering wheel and the ground is called the turning radius R of the automobile;
from a geometric schematic (see in particular fig. 2) we can obtain:
wherein, R: the turning radius of the automobile;
l: the distance between the shafts;
δ: an outboard front wheel steering angle;
the steering wheel and the steering wheel of the steering system of the automobile are connected through a speed reducing mechanism, and the following relation exists between the steering wheel rotating angle Q and the outer front wheel rotating angle delta:
Q＝K*δ
wherein K is the ratio of the steering wheel rotation angle to the front wheel steering angle, the steering wheel rotation angle Q and the front wheel steering angle delta are in a certain proportional relationship,
if the automobile is 10:1, the Q: delta is 10: 1;
if the axle distance L is 2.5m, the turning radius of the automobile can be obtained as follows:
s2, calculating the left and right deflection angles of the front lamp,
when the turning path matches the vehicle light illumination (as can be seen with reference to fig. 3):
θ＝arcsin(S/2R)
s is a parking sight distance, and specifically comprises the following steps:
S＝0.01V2+0.277V+0.029
in summary, the final set of equations can be derived:
with particular reference to fig. 4, it can be derived that the main flow chart illustrates:
after the system is initialized, starting to call a display subprogram for displaying; then, calling a key subprogram to acquire vehicle speed data; then judging whether the timing of the timer is finished for 100ms, and if so, timing the mark position 0; calling an AD conversion subprogram, acquiring an AD conversion value, and calculating a rotation angle through the AD conversion value; and acquiring data of the acceleration sensor to calculate an inclination angle, calculating a PWM duty ratio, outputting a PWM pulse control signal to drive a steering engine to operate, and adjusting the position of the headlamp.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (8)
1. An automobile headlamp position adjustment system, comprising:
the angular displacement sensing unit is used for collecting a steering wheel corner signal;
the inclination angle sensor unit is used for collecting an inclination angle signal of a steering wheel;
a key simulation unit for adjusting a vehicle speed;
the single chip microcomputer is used for processing signals sent by the key simulation unit, the inclination angle sensor unit and the angular displacement sensing unit and adjusting the position of the automobile headlamp through the follow-up steering engine unit; and
a processing unit within the single chip processor, which is programmed by the set of equations:
and calculating to obtain the actual deflection angle of the headlamp, and using the actual deflection angle to compensate the curve lighting blind area.
2. The system for adjusting the position of the headlamp of claim 1, wherein the angular displacement sensing unit comprises an angular displacement sensor, the angular displacement sensor is connected with a C3 interface on the single chip microcomputer, and an AD converter is arranged on a connection line between the angular displacement sensor and the single chip microcomputer.
3. The system of claim 1, wherein the tilt sensor unit comprises a tilt sensor, the tilt sensor is connected to H3 and H4 interfaces of the single chip microcomputer, and the H3 and H4 are used for controlling I of the chip2C interface, and performs I with tilt sensor2And C, communication.
4. The headlamp position adjusting system of claim 1, wherein the button simulation unit comprises a vehicle speed increase button and a vehicle speed decrease button, and the vehicle speed increase button and the vehicle speed decrease button are connected to the single chip microcomputer through wires.
5. The headlamp position adjusting system of claim 1, wherein the single chip microcomputer is an S9KEAZ128AMLK single chip microcomputer having I2And C, communication serial ports.
6. The headlamp position adjusting system of claim 1, wherein the follower steering engine unit comprises a horizontal follower steering engine and a vertical follower steering engine;
the single chip microcomputer receives steering wheel rotation angle and vehicle speed signals through C3, D0 and D1 interfaces, and the horizontal follow-up steering engine is controlled to operate by an H0 serial port; the tilt angle signals are received by H3 and H4, and the operation of the vertical follow-up steering engine is controlled by an H1 serial port.
7. The system for adjusting the position of the headlights of an automobile as claimed in claim 1, further comprising an OLED display for displaying the steering angle and the inclination angle of the body, wherein the OLED display is connected to the single chip via a wire.
8. The headlamp position adjusting system according to claim 1, wherein the formula set is calculated by:
s1, calculating the turning radius of the automobile,
according to the principle of the ackerman steering, all wheels roll purely in the rotating process of the automobile, all wheel shafts are intersected at a point O which becomes a steering center, and the distance from the steering center O to the contact point of the outer steering wheel and the ground is called the turning radius R of the automobile;
according to a geometric principle diagram, the following steps are obtained:
wherein, R: the turning radius of the automobile;
l: the distance between the shafts;
δ: an outboard front wheel steering angle;
the steering wheel and the steering wheel of the steering system of the automobile are connected through a speed reducing mechanism, and the following relation exists between the steering wheel rotating angle Q and the outer front wheel rotating angle delta:
Q＝K*δ
wherein K is the ratio of the steering wheel rotation angle to the front wheel steering angle, the steering wheel rotation angle Q and the front wheel steering angle delta are in a certain proportional relationship,
if the automobile is 10:1, the Q: delta is 10: 1;
if the axle distance L is 2.5m, the turning radius of the automobile can be obtained as follows:
s2, calculating the left and right deflection angles of the front lamp,
when the turning path matches the vehicle light illumination:
θ＝arcsin(S/2R)
s is a parking sight distance, and specifically comprises the following steps:
S＝0.01V2+0.277V+0.029
in summary, the final set of equations can be derived:
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Citations (7)
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|---|---|---|---|---|
| JPH07186819A (en) * | 1993-12-28 | 1995-07-25 | Koito Mfg Co Ltd | Cornering lamp system for vehicle |
| CN103991407A (en) * | 2014-05-13 | 2014-08-20 | 重庆大学 | Control method for horizontal turning angle of automobile headlamp |
| CN106541885A (en) * | 2016-09-30 | 2017-03-29 | 张家港长安大学汽车工程研究院 | A kind of car light follow-up control method based on steering wheel angle and vehicle roll angle |
| CN106671869A (en) * | 2015-11-10 | 2017-05-17 | 迅驰车业江苏有限公司 | Flexible steering system of automobile lamp |
| CN109435833A (en) * | 2018-11-12 | 2019-03-08 | 湖北文理学院 | Headlamp level angle control method based on automobile turning characteristic and car light type |
| CN210154812U (en) * | 2019-07-30 | 2020-03-17 | 西华大学 | Follow-up steering analog control device for automobile |
| CN210852219U (en) * | 2019-09-27 | 2020-06-26 | 广东电网有限责任公司 | Self-adaptive headlamp system |
-
2021
- 2021-09-27 CN CN202111136621.9A patent/CN113954737A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07186819A (en) * | 1993-12-28 | 1995-07-25 | Koito Mfg Co Ltd | Cornering lamp system for vehicle |
| CN103991407A (en) * | 2014-05-13 | 2014-08-20 | 重庆大学 | Control method for horizontal turning angle of automobile headlamp |
| CN106671869A (en) * | 2015-11-10 | 2017-05-17 | 迅驰车业江苏有限公司 | Flexible steering system of automobile lamp |
| CN106541885A (en) * | 2016-09-30 | 2017-03-29 | 张家港长安大学汽车工程研究院 | A kind of car light follow-up control method based on steering wheel angle and vehicle roll angle |
| CN109435833A (en) * | 2018-11-12 | 2019-03-08 | 湖北文理学院 | Headlamp level angle control method based on automobile turning characteristic and car light type |
| CN210154812U (en) * | 2019-07-30 | 2020-03-17 | 西华大学 | Follow-up steering analog control device for automobile |
| CN210852219U (en) * | 2019-09-27 | 2020-06-26 | 广东电网有限责任公司 | Self-adaptive headlamp system |
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